Long and short blinking red light indicates a 12+ hours charging time is recommended. A quick blinking red light indicates the battery will not take a charge. However, Li-ion batteries should be charged as soon as they power out, but if they are warm you may see the blinking red light. Let the battery cool before charging and try it again. If it continues to blink red it's time for the recycle bin.For long life Remember this with Li-ion batteries; They like to be charged and don't like being run too low. So when your tool quits DO NOT try to use it until it gets a good full charge.

Answered on 4/6/2015 by Bojangels from Monterey TN

A:

The red light means that the battery is charging.When finished it should turn green.

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